Automatic coal-spout-swinging device



April 30, 1929. w. H.. PHILLIPS I AUTOMATIC COAL SPOUT SWINGING DEVICE 2Sheets-Sheet Filed Dec. 12, 1924 April 30, 1929. w, PHILLl'Ps 1,711,155

AUTOMATIC GOAL SPOUT SWINGING DEVICE Filed Dec. 12, 1924 2 Sheets-Sheet2 I I I ii 50 I H 1 .5 1% I I: I J 29 I k :6?

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Patented Apr. 30, I929.

UNITED STATES WILLIAM H. PHILLIPS, OF CHICAGO, ILLINOIS,

ASSIGNOB TO HENRY PRATT COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.

AUTOMATIC COAL-SPOUT-SWIIQ'GING DEVICE.

Application filed December 12, 1924. fierial No. 755,466.

' My invention relates broadly to furnaces and more particularly to anautomatic coal spout swinging mechanism.

An object of my invention is to provide a mechanism of this type whichmay be cmploycd to reciprocate a coal spout commonly used for feedingcoal to a hopper of an automatic stoker.

A further object of my invention. is to employ 'a continuously travelingchain adapted to be clutched by the coal spout, the reciprocating motionof the coal spout by the chain being accomplished by the provision ofimproved means detachably secured to the spout and functioningautomatically to clutch the upper and lower-runs of the chain whenreaching the end of the travel each way.

A further object of my invention is to provide a construction, which issimple, inexpensive and reliable in operation, and which may be employedto readily swing the spout to and fro across the frontof the furnace bygripping preferably a chain which is of the contiuously traveling type.

An important feature of my invention resides in the particularconstruction used. A sprocket is employed as part of the clutchingmechanism and associated with the sprocket is a pair of pins of noveldesign alternately interlocking with the sprocket so as to restrain itsrotation until tripped, and thereafter to allow the sprocket to advanceand change its engagement with the chain. This arrangement affords meansfor effecting an adjustment of the travel of the spout, and furthermorefurnishes a simple and inexpensive motion reversing mechanism for theswinging coal spout. By properly adjusting the tripping means, thetravel of the clutching mechanism may be predetermined, irrespective ofthe length of the continuously traveling chain. On the other hand, anynumber of clutching mechanisms may be operated from a single drive.

I consider it an important object of this invention that the parts ofthe clutching mechanism, including the continuously driven chain and thedrive therefor, may be arranged as a unitary assembly within a singleeasing. Standardization is thereby posuble and I am able to furnish themechanism as a unit capable of attachment at the front of furnaces ofmany types and sizes.

At times it is highly desirable to feed the coal manually to the fire,when the lire is to be kept low, while, on the other hand, coal ofdesirable quality from a certain overhead bunker may he wanted through acertain spout. To meet these requirements, it is preferable to arrangethe swinging spout detachable from the clutching mechanism, and to thisend, I have novelly designed the mechanism to he quickly releasable fromthe spout without altering the construction or operation thereof.

These and other objects will appear from the following detailed.description of a preferred embodiment of my invention when read inconnection with the accompanying drawings, which form a part hereof.

In the drawings:

Figure 1 a side elevational View of a furnace having an automatic stokerand a swinging coal spout and illustrating the manner of adapting myinvention thereto.

Fig. 2 is a front elevational view of a reciprocating mechanismembodying my invention and illustrating it as a unitary assembly whichmay be attached across the front of a furnace.

Fig. 8 is a rear View of this mechanism.

Fig. 4c is a detailed sectional view of the left hand end of themechanism as shown in Fig. 2, with a cover plate removed to illustratethe drive thereof.

Fig. 5 is a detail view taken at the rear of the same end, illustratingthe releasing means employed to change the engagement of the clutchingmechanism with the upper and lower runs of a continuously driven chain.

Fig. 6 is an enlarged sectional view, taken on line 66 of Fig. 2;

Fig. 7 is an enlarged front view ofthe clutching mechanism, with a coverplate removed, however, to illustrate the manner in which the sprocketengages the chain; and

Figure 8 illustrates the spout in section but shows the manner in whichthe clutching mechanism loosely embraces the same in detachablerelation.

I preferably embody my invention in a mechanism capable of attachment asa unit at the frcnt of a furnace A and provide a drive extending at oneend of the mechanism for engaging a drive operating the automatic stokerB. An advantage is obtained by this arrangement, in that, I am able tostandardize the mechanism and adapt it to practically any make oiSiOkQl. or turnacc having a swinging spout for feeding ituel thereto.liloreover, when the mcchanism is designed in the form of unit, thearrangement more readily permits the 1ncchanism to be disconnected fromthe spout in order to operate the latter manually when so desired.

An elongated or rcctai'igular casino; 2 of channel tori ation, asillustrated in Fig. l provided with a tracl tway 3 in its rear wall 4:.The edges of the channel casing are turned inwardly toward each other toform the upper 'Nl lower flanges 5. This casing may be a .ached at thetront of furnace A in any suitable manner, say by the 6 shown in Fig. 1.

A clutching mechanism, in the term of a reciprocating shuttle, isprovided for move mentwithin casino 2, the upper and lower flangesserving ig htly to overlap and retain the mechanism within the casing;

At the ends of casino 2, sprockms '7 and S are suitably mounted forrotation. An endless chain 10 may be entrained over these sprockets andmay be driven through the sprocket 7 which is provided with a driveconnecting; with the drive of stoker B.

This drive comprises a gear 11 on a shaft 12 carrying sprocket 7, and asimilar gear 18 on a shaft 14: which extends through a cover plate 15and has a sprocket 16 at its outer end. A chain 17 is adapted to beentrained over sprocket 16 and mesh with a gear 18 co1npr'.;in.g part ofthe drive of stoker l3. Adjustable take-up means may be provided forkeeping; the chain taut by mounting: the end sprocket 8 on a shaft eX-tcndin rz' in a block 20 at the roar of casing 2. lilock 20 isadjustable in track-way 3 by means of screw 21. extending; through l te22. Nuts 23 may be threaded either j on the screw 21 to vary theposition of: the block 20 and consequently the sprocket 8 carriedthereby. 1

The clutching mechanism comprises a housing 25 l aving the vertical.side lugs 26, in which rollers 27 may be mounted for movement along thetrack-way A sproclo et 28 is ro ably mounted within this housing: 25 bymeans of a bolt 29. This bolt is provided with threaded portion enterinz the housing; 25 and has a collar 30 about its cylindrical portion, onwhich the sprocket 28 rotates. The bolt 29 also serve. to secure a coverplate 31 to the front of the housing 25, this cover plate being;providcd with outwardly extending lugs 32 for rece im: a spoutcngaging;yoke member 33. 1 preferably secure yoke 33 to cover plate 31 by meansof pins 34;, which may at any time be removed to release this yoke 33.

lit the rear of housing25, a bar 38 may be secured. lnternally threadedtransverse bosses 39 are formed integrally and have their aperturesadapted alternately to register with a series of openings 40 in sprocketThis sprocket may be reinforced at both sides by disks 41 also havingopenings cooperating with the openings 40 and comprising in fact acontinuation thereof.

Sprocket 28 may have teeth 45 spaced a predetermined distance apart,which are preferably arranged in pairs equal to the number oil openings40 in the sprocket. its will be noted in Fig. 7, the teeth 45 at the topof sprocket 28 are meshing with the continuously driven chain 10. As Ishall later explain, this sprocket may be released from mesh with. theupper run of chain 10 and may be allowed to advance clockwise slightlyso that opening 40 will register with the dotted circle 46. Theadvancing movement of the sprocket is accomplished by means which Ishall later describe, and which may be employed for temporarily holdingthe sprocket locked against rotation during the time the clutchingmechanism is moving from one end to the other of cars ing 21. This meansserves to release the sprocket, and the chain 10 will rotate the latterslightly to lim this opening 40 in register with the dotted circle 416,where upon the sprocket is again locked against rotation. The teethdesignated 45 will then be in mesh with the lower run of the chain 10and the movement of the clutching mechanism will be reversed.

This means comprises a pair of pins l8 and 49, which have threadedshanks and 51, respectively, one having a right handed thread, and theother having a left handed thread. The inner ends of the pins arereduced as indicated at 52 and are free to move into the openings 40 insprocket 28 when broughtin register therewith. llhe pitch of the threads50 and 51 is such that slight rotational movement of the pins 48 and 49will move the latter a distance suitficient to engage or withdraw theportions 52 thereof from the openings 40, as the case may be. It will benoted in Fig. 7 these pins are arranged in a manner to allow but one toenter an opening 40 at any one time. Consequently, it the pin t8 isengaging in one of the openings 40 to lock the sprocket 28 againstrotation, the pin 4-9 is withdrawn.

Fingers 53 {11K are secured to the ends of the pins 48 and 49ri-ispcctively. A spring 55 interconnects these lingers at their lowerends. At the opposite ends of casing 21, have so arranged a D1 ol"brackets 56 t tripping members 57 and 58 provided thereon are in thepath of movement of the upper ends of fingers 53 and 54. These tripping;members may take the term oi rollers, it so desired. When the clutchingmechanism moved to the right as shown in Figs. 3 and 5, the roller 58 isadapted to engage the finger 58 and pivot it to a vertical position, asillustrated in Fig. 5. This causes the spring to be placed undertension, thereby influencing the finger 54 to likewise move to itsvertical position. This movement, however, is restrained until thesprocket 28 has rotated slightly so as to bring the opening 40 intoalignment with the dotted circle 46, which in Fig. 7 represents the pin49 in back of the sprocket. In other words, the sprocket is rotated soas to bring the opening 40 in register with this pin 49. Being underspring tension, the pin 49 is now rotated to its vertical position, suchmovement being sufficient for the threads 51 to carry the pin 4:9inwardly a distance sufticient to lie in the opening 40. After thesprocket has rotated, the pin T8 is prevented from again engaging in oneof these openings 40 until a similar operation occurs at the other endofthe casing .21, so as to withdraw the pin 49 and allow the sprocket 28to again rotate or advance and permit pin 48 to engage again.

Yoke 38 serves to engage a coal spout having a flexible joint 56 at itsupper end to permit the spout to swing to and fro across the front ofthe furnace A. Autoinatic stoker B is furnished with the usual coalhopper 57, into which the coal spout 55 feeds. It is common to extend abar 58 across the front of the hopper 57 for guiding the coal spout 55,this spout being provided with an anti-friction roller 59 which engagesthe bar 58.. A handle 60 usually ex tends downwardly a distance to beaccessible for manually reciprocating the spout 55. l find that it ispreferable to arran e my improved spout swinging mechanism, so that itcan be readily detached from the spout to allow manual operation bymeans of the handle 60. This is often desirable when there is a low fireand hand feeding is necessary, or, when access to the coal in theoverhead bunker 61 is desirable, due to the quality of the coal and thedesire to use it for a particular purpose. Yoke 38 is pivotally mountedon the pins 34c carried by the cover 31, and therefore, may be readilyreleased from the spout by moving upwardly about these pins.

1 shall now describe the operation of the device.

Assume that the clutching mechanism is approaching the left hand end ofthe casing as is illustrated in Fig. 2. Sprocket 28 will be in mesh withthe upper run of chain 10 traveling in the direction of the arrow inthis figure. It will be remembered, of course, that this sprocket islocked against rotation due to the pin 48 engaging in one of theopenings 40. As soon as the finger 53, however, engages roller 58, as isillustrated in Fig. 5, pin 48 is withdrawn.

latter in position.

Sprocket 28 will slip about its pivot until another opcnu g .0 registerswith the pin d9. lvTOVQll'iCHl or the pm out of interlocking engagementwith the sprocket 28.

causes the spring 5-5 to be placed under tension and thereby exert aforce against the linger 54;, which force will immediately revolve thepin 4:9 when one of the openings 40 and the sprocket 28 held againstfurther slipping about its pivot. Such slipping of the sprocket 28 forthe purpose of bringin the teeth 45 in mesh with the lower run or chain10. The clutching mechanism is now locked to the lower run of the chainand caused to travel to the right. The same tripping action andreleasing of the sprocket 28 so as to change its mesh from the lower tothe upper run occurs whenthe finger 5 1 strikes ag the roller 57. Hence,it will be noted tl it the clutching mechanism is permitted to move toand fro within the casing 21, its reversing movement occurring as soonas it reaches the enos of the casing 21.

As before pointed out, I novelly arrange the various parts of themechanism within the casing 24 so as to provide a unitary assembly. Thisassembly is capable of attachn'ient to many types of furnaces,therebypermitting standardization of the parts. I have found, as a generalrule, that the casing may fit across the front of furnaces of differentsizes. The travel of the clutciiing mechanism may be predetermined byproviding the plates 56 of the tripping means adjustable. These platesare provided with bolts 60 which extend through the openi g 3 in casing21 and hold clamping plates 61 in position against the side of thecasing opposite to the plates 56 in order to clamp tie Should the widthof the furnace require a shorter travel of the clutching mechanism thanthat shown in the drawings, both plates 56 may be moved toward thecenter. On t other hand. should the travel of the clutcnng mechanism berestricted at one end only, the adjacent plate 56 may be moved towardthe center. In other words the arrangement such that the travel. may bequickly changed without requiring change to be made in the cusing, chain10 or the position of its end sprockets 7 and 8, or in the drivethereof, whether this drive taken from: the stoker drive or from a motoremployed e pecially therefor.

Various modificzn'ions and other embod ments of my invention arepossible, and consequently, I do not intend to be limited to the exactdisclosure shown herein.

I claim:

l l t) 1. In a mechanism for use with an automatic stoker provided witha swinging spout for feeding fuel. evenly from end to end to a hopper ofa furnace comprising an assembly, which in its entirety is fastened as aunit to the front of said furnace, and means mounted to readily swinginto engagement with said spout for reciprocating said spout.

2. in a mechanism for with an automatic stoker provided with a swingingspout for feeding fuel evenly from end to end to a hopper of a furnacecomprising an assembly embodying a continuously driven chain, a spoutembracing means alternately engaging the upper and lower runs of saidchain, and a casing for housing said parts 3. In a mechanism for usewith an. automatic StOlIGl' for feeding fuel evenly from end to end to ahopper comprising a casing for fitting across the front of the furnace,and a clutching mechanism arranged to travel to and fro within. saidcasing and to detachably connect to a coal swinging spout, said casingand said clutchiiu mechanism being secured as a unit to the iront ofsaid furnace.

t. In a mechanism for use with an automatic stoker for feeding fuelevenly from end to end to a hopper comprising a casing for fittingacross the front of the furi'iacc. a clutching mechanism arranged totravel to and fro within said casing and operably to connectto a coalswinging spout, and meansoperably connected to the drive of said. stokerfor driving said clutching mechanism in timed relation to the operationof said stoker, said casing embodying said clutching mechanism and saiddriving means as a unitary assembly for mounting at the front of thefurnace.

5. ln a mechanism for use with an automatic stoker for feeding fuelevenly from end to end to a hopper comprising a swinging spout, meansfor feeding fuel to said spout, clutching means at the lower end of thespout adjacent to said. hopper, and a con tinuously rotating memberconnected to and operated by the drive of said automatic stolcer havingits upper and lower runs alternately engaged by saidv clutching meansfor reciprocating said spout according to the rate of speed at wnichsaid stoker is driven.

(3. In a mechanism for use with an auto matic stoke]? for feeding fuel.evenly from end to end to a hopper comprising a swinging spout, meansfor feeding fuel to said spout, clutching means at the lower end of saidspout including a sprocket and a pair of pins associated therewith foralternately engaging openings in the sprocket, anda continuouslyrotating member having its upper and lower runs alternately engaged bysaid sprocket for reciprocating said spout, the alternating engagementof said pins with said sprocket reversing the movement of said spout.

8. In a mechanism for use witn an automatic stoker for feeding fuelevenly from end to end to a hopper comprising a swinging spout, meansfor feeding fuel to said spout, clutching means operably connected tosaid spout including a sprocket, a pair of pins alternately engaging inopenings in said sprocket and means for interconnecting said pinswhereby Withdrawal of one pin tends to engage the other pin in saidsprocket, and a continuously rotating member having its upper and lowerruns alternately engaged by said sprocket for reciprocating said spout,the alternating engagement of said pins with said sprocket reversing themovementof said spout.

9. In a mechanism for feeding fuel to a furnace comprising a swingingspout, means for feeding fuel to said spout, clutching means including asprocket having teeth space-d a predetermined distance apart, saidclutching means being operably connected to said spout, and a.continuously rotating member having its upper and lower runs alternatelyengaged by the spaced. teeth of said sprocket for reciprocating saidspout.

10. In a mechanism for use with an automatic stoker provided with aswinging spout for feeding fuel evenly from end to end to a hopper of afurnace comprising clutching means for reciprocating said spout, acasing for housing said clutching means, gears at the ends of saidcasing, and a continuously driven member running over said gears andhaving its, upper and lower runs adapted for alternate engagement withsaid clutching means.

11. In a mechanism for use with an auto matic stoker provided with aswinging spout for feeding fuel evenly from end to end to. a hopper of afurnace comprising clutching means for reciprocating said spout, acasing for housing said clutching means provided with an opening thereinserving as a track for said clutching means, a continuously drivenmember having its upper and lower runs adapted for alternate engagementwith said clutching means, and means on the rear of said casing adjacentthe ends of said track opening adapted to engage a projecting portion ofthe clutchmg means for releasing the same from one of the runs of saidcontinuously driven member and simultaneously engaging it with the otherrun.

12. in a mechanism for use with an automatic stoker provided with aswinging spout for feeding fuel evenly from end to end to a hopper of afurnace comprising a clutch ing mechanism detachal'ily secured to saidspout for reciprocating the same, a casing for housing said clutchingmechanism where-- by the same may be men and at the front of saidfurnace in the form of a unit, and a drive extending at one end of saidcasing for connecting with the drive of said stoker whereby the fuelfeeding through said spout may be supplied to said hopper in proportionto the operation of said stoker.

13. In a mechanism for use with an automatic stoker provided with aswinging spout for feeding fuel evenly from end to end to a hopper of afurnace comprising a casing having trackway therein, rollers adapted tobe guided in said trackway, a housing, a sprocket rotatably mounted onsaid housing, a continuously driven chain having its upper and lowerruns alternately meshing with said sprocket, and means adapted toadvance said sprocket when reaching the end of said trac'kway so as tochange the engagement of said sprocket with the upper and lower runs ofsaid chain.

14. In an automatic reciprocating mechanism for with a s cut for feedingfuel to a furnace, a continuously driven chain, a sprocketadaptedalternately to engage the upper and lower runs of said chain, means fordetachably securing said spout to said mechanism, and means forpermitting said sprocket to advance when reaching the ends f its travelfor changing the engagement thereof with the upper and lower runs ofsaid chain.

v 15. In an automatic reciprocating mecha nism for use with a spout forfeeding fuel to a furnace, a continuously driven chain, a sprocketadapted alternately to engage the upper and lower runs of said chain,means for detachably securing said spout to said mechanism, and meanscomprising pin members adapted alternately to interlock with saidsprocket and to permit said sprocket to thereby change itsengagementwith the upper and lower runs of said chain.

16. In an automatic reciprocating mechanism for use with a spout forfeeding fuel to a furnace, a continuously driven chain, a sprocketprovided with a plurality of openings adapted alternately to engage theupper and lower runs of said chain, means forv detachably securing saidspout to said mecha nism, and means comprising pin members foralternately engaging 1n said openings so as to change the engagement ofsaid sprocket with the upper and lower run of said chain and reversethemovement of said spout.

17 In an automatic reciprocating mechanism for use with a spout forfeeding fuel to a furnace, a continuouslyrotating chain, a sprocket foralternately engaging' the upper and lower runs of said chain, means fordetachably securing said spout to said mechanism, means comprising pinmembers for changing the engagement of said sprocket with the upper andlower runs of said chain, and means for tripping said pin members tosecure alternate engagement thereof with said sprocket so as to permit apredetermined advance of said sprocket and a consequent 19. In anautomatic reciprocating mechanism for use with a spout for feeding fuelto a furnace, continuously driven chain and end rollers therefor, acasing supporting said rollers and, a trackway provided in said casinahousing having a sprocket rotatably mounted thereon and movable alongsaid trackway, tripping elements the ends of said trackway, ant meanscooperating with said tripping elements for alternating the engagementof said sprocket with the upper and lower runs of said chain, said meanscomprising a pair of pins engaging said sprocket one'at a time.

20. In an automatic reciprocating mechanism for use with a spoutforfeeding fuel to a furnace, a continuously driven chain and end rollerstherefor, a casing supporting said rollers and a trackway provided insaid casing, a housing having a sprocket rotatably mounted thereon andmovable along saidtrackway, tripping elements at the ends of saidtrackway, and means comprisinga pair of pins for alternately engagingsaid sprocket and havingright and left handed threaded shanks, saidshanks thread ing into said housing, the threads of each being of apitch permitting axial movement of the pins sufficient to engage orwithdraw the same by a slight rotation thereof.

21. In a mechanism for use with an automatic stoker provided with a.swinging spout for feeding fuel evenly from end to end to a vhopper of afurnace comprising a clutching mechanism arranged to travel to and froacross the front of the furnace in engagement with said spout, atrackway for said clutching mechanism, and means for reversing themovement of said clutching mechanism between predetermined points alongsaid trackway.

22. In a mechanism for use with an automatic stoker for feeding fuelevenly from end to end to a hopper of a furnace comprising a clutchingmechanism arranged to travel to and fro across the front of the fur naceand to detachably connect to a coal swinging spent, and means formounting said. clutching mechanism between said furnace and said spout.

23. A spout swinging device com n-ising a shuttle, and a connection withsaid shuttle including a pivotally mounted. yoke-like member adapted tobe pivotally lifted into and out of engagement with a spout.

24. In a mechanism for swinging a spout substantially from end to end ofa hopper including means for guiding said spout along said hopper, thecon'ibination with means arranged to travel to and fro across said hopper and having means provided thereon for loosely embracing said spoutto provide a r detachable connection therewith.

25. In a mechanism for swinging a spout substantially from end to end ofa hopper including means for sustaining the weight of the spout duringits move 'icnt along the hopper, the combination with means arranged totravel to and fro across the hopper and having provisions for looselyembracing said spout.

26. In combination with an automatic stolrer, and a hopper therefor, aswinging chute arranged to move back and fortl'i to distribute coalalong said hopper, an endless belt extending parallel to the movement ofsaid swinging chute, means for driving said belt, a reciprocating devicemovable in a plane parallel to said belt and operably driven by saidbelt, and. a yoke loosely embracing said swinging chute and iiivotallyconnected to said reciprocating device.

27. In combination with an automatic stoker and hopper therefor, aswinging chute arranged to move back and forth to distribute coalalongsaid hopper, an endless belt extending parallel to the swinging ofsaid swinging chute, a track, a shuttle provided with rollers formovement along said track, means for connecting said shuttle to saidchute, and means connecting said shuttle to a point on said chain.

28 In combination with an automatic stoker, and a hopper therefor, aswinging chute arranged to move back and forth to distribute coal alongsaid hopper, a frame provided with a trackway mounted adjacent anautomatic Stoker, a hopper therefor, and a swinging chute ar niged tomove back and forth to distribute coal. along said hopper, of amechanically operated chute swinging device comprising a membercontinuously moving throu h a )rcdetermined )ltli which liessubstantially parallel to the swinging of said swinging chute, aconnection between said member and said swinging chute, said connectionincluding a shuttle-like member having pivotal means for connecting itto said chute and means for also connecting it to said continuouslymovable member.

30. in combination ith an automatic stoher, a hopper therefor and aswinging chute arranged to move back and forth to distribute coal alongsaid hopper, of a mechanically operated chute swinging device comprisingan endless belt extending substantially parallel to the swinging of saidswinging chute, a shuttle, a trackway for guiding said shuttle, aconnection for attaching said swinging chute to one side of saidshuttle, and a second connection for attaching said. belt to the otherside of said shuttle.

31. in combination with an automatic stolrer, a hopper therefor and aswinging chut arranged to move back and forth to distribute coal alongsaid hopper, of a mechanically operated chute swinging device comprisinga continuously driven chain, a frame for carrying said chain, a trackwayon said frame, rollers for supporting in suspended relation at one sideof said frame a shuttle which is adapted to be connected to said chuteand to said chain.

82. In combination with an automatic stolrer, hopper therefor and aswinging chute arranged to move back and forth to distribute coal alongsaid hopper, of a mechanically operated chute swinging device comprisingan endless belt, means for driving said belt, a shuttle for connectingsaid swinging chute to a point on said belt, a traclrway along whichsaid shuttle moves, and roller members for supporting said shuttle onsaid trackway.

In witness whereof, I have hereunto sub scribed my name.

WILLIAM H. PHILLIPS.

